Ashford is a census-designated place mostly within Pierce County, Washington, United States. Its population was 303 as of the 2020 census. The town is west of the main entrance to Mount Rainier National Park. Surrounding mountains and the narrow Nisqually River valley are heavily forested. Some of Ashford is across the Nisqually River in Lewis Cou…Ashford is a census-designated place mostly within Pierce County, Washington, United States. Its population was 303 as of the 2020 census. The town is west of the main entrance to Mount Rainier National Park. Surrounding mountains and the narrow Nisqually River valley are heavily forested. Some of Ashford is across the Nisqually River in Lewis County.